There is a latest version of Win4D Advance V3.0 for upgrading. There are feedback that Win4D went missing after upgrading.

This is most likely because of your Antivirus software. They will auto delete the upgraded files from your system without any warning. I am not sure why the antivirus software perform this particular action, but I am very sure our software is not infected.

The best way to avoid the above error is to ensure you disable your antivirus software before you do the upgrading. Also, please add an exclusion folder in your antivirus software for the Win4D Advance directory. This will ensure any changes will not be affected. You may follow the below example.